nav,
header,
section,
article,
aside,
footer {
display: block;
}
body,
p,
pre,
hr,
ul,
dl,
dd,
h1,
h2,
h3,
h4,
h5,
h6 th,
textarea,
td,
ol,
menu,
legend,
input,
fieldset,
button,
form,
dir,
keygen,
select,
isindex,
xmp,
plaintext,
listing,
address {
margin: 0;
padding: 0;
}